/Engine/Source/Runtime/GeometryCore/Public/Sampling/VectorSetAnalysis.h
Initialize the internal set of Vectors and IDs using an external integer-Enumerable and associated GetVector(ID) function
template<typename EnumerableIDType> void Initialize ( EnumerableIDType EnumerableIDs, [TFunctionRef](API\Runtime\Core\GenericPlatform\TFunctionRef)< [TVector](API\Runtime\Core\Math\TVector)< RealType >(int32)> GetVectorFunc, int32 NumVectorsHint, bool bIsNormalizedHint )